Question: which binary relation starts with the letter s
Paraphrase: which twofold connection begins with the letter s
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q130901 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 's')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: subset, subset, simultaneity, simultaneity, subsequence, subsequence, succession, succession